Answer:
Explanation:
The Germans started using the toxic gas which killed any troops in the radius that is not wearing a gas mask. Most of the chemical weapons burst your lungs or filled your lungs with water. The machine gun was probably the most important as they cut down any incoming troops. Wave after wave of enemy troops would rush trenches and the fastest way of killing them were machine gun dig out. These impacted the war and these are the main reasons war changed forever. With chemical weapons, you could kill many people without having a single casualt. With machine guns, it was really hard to attack trenches, and you could cut down hordes of people instead of the conventional bolt action rifle.
